Reticulitermes spp.
Subterranean termites
Soil-based colonies can damage concealed wood for years. Mud tubes, indoor swarmers, or damaged wood justify a licensed inspection.
Pro, always
Identification
signs of termites: traits that settle it
- Workers
- Soft-bodied, pale insects that avoid light and remain inside soil, tubes, or wood
- Swarmers
- Dark-bodied reproductives with two pairs of equal-length wings
- Mud tubes
- Pencil-width soil shelter tubes across foundations, piers, plumbing, or cracks
- Damage
- Wood excavated along the grain, often with a thin surface left intact
- Colony source
- Usually soil beneath or near the structure
Termite swarmers have straight antennae, a broad waist, and four equal-length wings. Flying ants have elbowed antennae, a pinched waist, and shorter hind wings. Carpenter ants leave clean sawdust-like frass; subterranean termites line galleries with soil or mud.
Signs
Signs of a subterranean termites problem
- Mud tubes
Shelter tubes on foundations, crawlspace piers, sill plates, or plumbing protect workers traveling between soil and wood.
- Indoor swarmers
Winged termites or piles of equal-length wings near windows often mean a colony is in or beneath the structure.
- Hollow or blistered wood
Trim, flooring, or framing may sound hollow, feel soft, or show rippling over concealed galleries.
- Soil in cracks
Packed soil appearing in wood joints, expansion gaps, or foundation cracks can be termite construction.
- Damaged structural wood
Galleries follow the grain and may contain mud, unlike the smooth clean galleries made by carpenter ants.
Compare
Subterranean termites vs Carpenter ants
| Trait | Subterranean termites | Carpenter ants |
|---|---|---|
| Winged adult | Broad waist, straight antennae, four equal wings | Pinched waist, elbowed antennae, shorter hind wings |
| Wood galleries | Follow grain and contain soil or mud | Smooth, clean galleries across grain |
| Debris | Usually no sawdust pile | Coarse frass with insect fragments |
| Primary source | Soil colony | Often damp or water-damaged wood |
Lifecycle
Why this pest spreads
- Colony structure
A queen and king produce workers, soldiers, and winged reproductives in a long-lived social colony.
- Swarming
Mature colonies release winged adults, often after warm rain, to pair and attempt new colonies.
- Continuous feeding
Workers forage year-round when soil temperatures allow and share cellulose with the colony.
- Hidden expansion
Colonies can use cracks as narrow as about 1/32 inch and may have several feeding sites.
DIY that works
What to try before you call
- Preserve the evidence
Photograph tubes, wings, and damage. Save specimens in a sealed container rather than cleaning everything away.
- Do not break or spray tubes
Surface killing workers does not eliminate the colony and can make the inspector’s activity assessment harder.
- Reduce moisture, not evidence
Correct leaks and drainage problems, but avoid removing damaged wood before inspection unless safety requires it.
- Request a full inspection
The inspector should evaluate the foundation, crawlspace, accessible framing, conducive conditions, and treatment history.
- Compare treatment plans
Ask whether the proposal uses a liquid barrier, bait system, or both; what areas are excluded; and how warranty and monitoring work.
Handle it yourself if these fit
Retail products can finish it
- Moisture correction and removing wood-to-soil contact after inspection
- Monitoring stations only as part of an informed inspection plan
When to call
Past what DIY reliably reaches
Call a licensed pro if any of these is true
- Mud tubes, swarmers, shed wings, or suspicious wood appear
- The structure has prior termite history or an expired warranty
- Wood contacts soil or inaccessible construction limits inspection
- A real-estate transaction requires a documented evaluation
Cost & prep
What a visit usually looks like
$500–$2,500+
Typical U.S. range for localized-to-whole-structure subterranean termite treatment. Linear footage, construction, system type, and warranty drive price; repairs are separate. Not a quote.
Prep checklist before a tech arrives
- Leave mud tubes and damaged areas undisturbed.
- Save wings or insects and note when and where they appeared.
- Clear access to foundation walls, crawlspace entries, utility rooms, and garages.
- Locate prior termite reports, warranties, and treatment records.
- Report leaks, drainage issues, additions, slabs, and inaccessible areas.
FAQ
Common questions about subterranean termites
Can I treat subterranean termites myself?
Whole-colony control and a continuous protective treatment require specialized inspection, equipment, and product placement. Store-bought spot sprays do not address the soil colony.
What do termite mud tubes look like?
They are narrow, irregular soil tubes running over concrete, masonry, wood, pipes, or cracks. Active tubes may be repaired by workers after a small section is disturbed, but leave testing to an inspector.
Are flying termites a serious sign?
Indoor swarmers or piles of equal-length wings are strong evidence of a colony in or beneath the building. Outdoor swarmers alone may originate from a nearby natural colony.
How can I tell termites from flying ants?
Termites have straight antennae, broad waists, and four equal wings. Ants have elbowed antennae, pinched waists, and shorter hind wings.
Does termite damage happen quickly?
Noticeable structural loss usually develops over time, but the colony may have been feeding unseen for years. Prompt inspection limits uncertainty and potential repair cost.
Which is better, liquid treatment or bait?
Both can work when correctly designed and maintained. Soil conditions, construction, access, colony pressure, warranty terms, and homeowner preferences determine the better plan.
Will homeowners insurance cover termite damage?
Standard policies commonly exclude damage from insects or gradual maintenance issues. Review your own policy and document the inspection and repairs.
How often should a home be inspected?
Annual inspection is reasonable in high-risk regions or after prior activity. Follow any warranty schedule and inspect sooner when signs or moisture problems appear.
What conditions attract subterranean termites?
Wood-to-soil contact, persistent moisture, poor drainage, foundation cracks, buried wood, and dense cellulose debris make access and survival easier.
Related pest guides
All pest guidesCall about subterranean termites control
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Disclosure
Not a pest control company. A referral can pay us. DIY steps on this page do not change based on who pays.